Cleqee is cheapo Chinese brand making test leads and probes. They are generally acceptable but don't expect high quality, silicon insulated wire and similar luxuries. OK for banana leads but 5kV rated scope probe I would buy from a reputable manufacturer rather than eBay. I value my life and the scope for more than this.
As far as I can tell "Cleqee" is just a reflipper brand.... You can find the same so-called "Cleqee" products under many different brands, also western brands that have sourced it from the Far East.
China is mind-boggling huge when it comes to creating anything under the sun, and a lot of these products are "no name" and can be relabeled.
As far as I can tell, it looks to be "Jiangsu Zhongce Electronics" that is actually making these "Cleqee-HV probes" alongside many other things that you often see labeled with Cleqee and other brands.
Jiangsu Zhongce Electronics emphasizes all their high-end SMT production-lines and how they cater/source for many brands and also refers to 1.5G scopes, 3G able sig-gens, and HV-probes.
- if Jiangsu Zhongce is the same company as (Zhongce Instruments) aka "ZCtek" that makes a lot of lab-test-gear.. I don't know, but I reckon it is the same company, as "Jiangsu" looks to be a province and "ZCtek" was awarded that Jiangsu award in 2010, so clearly the same region... looks to be the same company.
Zhongce seems to be of a decent size with numerous daughter companies in various different segments.
It's a maze trying to find heads & tails of these Chinese companies that are very entangled.
https://en.zctek.com.cn/product/15/You can find these probes in numerous variants..
2300A/B/C and they likely all come from the same Chinese production backland... (attenuation & specs vary)
If these brands have sourced their models, from the same backland in China.. I don't know, but It wouldn't surprise me, a lot of denominators between them.
* U1562A KEYSIGHT Agilent 300MHz/3½KV (Blue & Grey variant)
* Hioki 9666 Probe (100:1) 200Mhz 5KV (blue)
https://www.testequity.de/product/33673-1-9666* Peakelect P2301C 300MHz 5KV (blue & Red)
* Cleqee P2301C 300MHz 5KV (Red)
* It also seems to be the same 100X model that is highlighted as an accessory for a lot of isolated handheld scopes. fx Siglent SHS800 (blue variant) and also Keysight Agilent U1604B where the datasheet highlights that it also exists in an X100 variant that can manage a tad over 3½KV / 300MHz.
Likely also why, these probes aint labeled with any brands..there is nothing in this product that says "Cleqee".. they come in the standard transparent pouch envelope that any vendor could bundle with a given scope.
I get that some users really don't like these "no name" products, and will gladly pay 5x or even 10x for that "brand-label" of the exact same item from a reputable seller, and it also makes sense when it comes to test gear, not least for HV, where you really dont wanna chance it, and you as an individual or as a responsible company need a certain assurance that tolerances are met.'
Are Keysight older passive probes made in China.? (this 300MHz U1562A were made obsolete 2 years back by a new 500MHz B-model)
https://www.keysight.com/us/en/product/U1562A/passive-probe-100-1-300-mhz-1-2-m.html